Trapcode Particular 1.5 watermark wont go away

Even after entering my serial number for trapcode particular 1.5 the big X and demo watermark wont go away. It tells me to go into the options menu and enter the serial number for it to go away, but even after I enter the serial the watermark remains, anybody experience something similar?

Dont use a mac, so not really sure the problem. I know this is pretty obvious, but are you sure you are using the correct serial. did you copy and paste it, or type it in. The most likely problem is sometimes the most obvious. Other than that, I would say uninstall and reinstall - or whatever you do on a mac. Worst case scenerio, give trapcode or red giant a ring.

Hey Kevin, I was running into that same issue in After Effects CS4 using Particular 2. I found the root of my problem was that I had the "Render Multiple Frames Simultaneously" checkbox turned on in the "Memory & Multiprocessing" section of After Effects' preferences panel. When I turned off "Render Multiple Frames Simultaneously", Trapcode's Particular was rendered properly without the watermark. Not sure if this solution will work for you, but you could give it a try.